Tuning the EJB3 Implementation

During my evaluation of highly scalable technologies I incurred in some performance problems with the EJB3 implementation. It seems to me that it is a quite common problem

Measuring the Speed of Clouds

I have started a project for benchmarking highly scalable technologies. My plan is to use cloud computing platforms and implement the same application using different stacks of technologies. The aspect I want to evaluate is performance when the number of nodes grows a lot.